To provide an earth and sand transport system which is carried out in a simple manner, and copes with a long-range transport.

The earth and sand transport system is comprised of a feed pipe 21 for transporting a transporting medium to a source, a transport pipe 22 for discharging the transporting medium and earth and sand from the source of the earth and sand, an intermediate tank 11 arranged at some midpoint of the feed pipe 21, for storing therein the transporting medium, a separator 13 arranged at some midpoint of the transport pipe 22, for separating the transporting medium from the earth and sand, a returning pipe 24 for returning the transporting medium separated by the separator 13 to the intermediate tank 11, an air feeding device 14 for feeding air to the transport pipe 25 on a downstream side of the separator 13, and a sucking device 15 arranged at some midpoint of the transport pipe 25 on one side of the air feeding pipe 14 closer to a transport destination.